What is the total weight of a 15' long W18x30 beam in pounds?

To determine the total weight of a 15-foot long W18x30 beam, it's essential to know the weight per foot of this specific beam type. The "W" in W18x30 signifies that it is a wide flange beam, where "18" refers to the nominal depth (18 inches) and "30" refers to the weight per foot (30 pounds).

To calculate the total weight, the weight per foot is multiplied by the total length of the beam in feet. Therefore:

Weight of the beam = Weight per foot × Length

Weight of the beam = 30 pounds/foot × 15 feet

Weight of the beam = 450 pounds

Thus, the total weight of the 15-foot long W18x30 beam is 450 pounds, supporting that B is the correct answer. This calculation is straightforward when you understand how to read the designation of the beam and its implications regarding its properties.